145442513 has 2 divisors, whose sum is σ = 145442514. Its totient is φ = 145442512.

The previous prime is 145442491. The next prime is 145442519. The reversal of 145442513 is 315244541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106853569 + 38588944 = 10337^2 + 6212^2 .

It is a cyclic number.

It is not a de Polignac number, because 145442513 - 2¹⁶ = 145376977 is a prime.

It is not a weakly prime, because it can be changed into another prime (145442519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72721256 + 72721257.

It is an arithmetic number, because the mean of its divisors is an integer number (72721257).

Almost surely, 2^145442513 is an apocalyptic number.

It is an amenable number.

145442513 is a deficient number, since it is larger than the sum of its proper divisors (1).

145442513 is an equidigital number, since it uses as much as digits as its factorization.

145442513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 145442513 is about 12059.9549335808. The cubic root of 145442513 is about 525.8926769042.

The spelling of 145442513 in words is "one hundred forty-five million, four hundred forty-two thousand, five hundred thirteen".